Wrench.



PATENTED JAN. 8, 1905.

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PATENT OFFICE.

WRENCH.

SPECFICATIONforming part of Letters Patent No. 779,301, dated January 3, 1905.

Application led July 2, 1904. Serial No. 215,125.

To (ZZZ whom, t may concern,.-

Be it known that I, FREDERICKIILLIAM Mc- NABB, a subject of the King of Great Britain, and aresident of Parry Sound, in the Province of Ontario, Dominion of Canada, have invented a new and Improved Wrench, of which the following is a full, clear, and exact description.

My invention relates to a wrench capable of many uses, but especially adapted for use on pipes and the like, its main objects being' to secure a maximum efficiency in devices of this character without increasing the cost or causing any undesirable complication.

Other objects are to prevent slipping of the instrument and injury to the pipes or other articleson which it is to be used and to provide for wide adjustments and the like.

Further objects will be mentioned in the course of this specification.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation, partly in section, showing a preferred form of my invention. Fig. v2 is a plan view thereof. Fig. 3 is an end elevation. Fig. 4 is a sectional view on the line 4 4 of Fig. 1, and Fig. 5 is a fragmentary plan view showing the construction of a chain which I prefer to employ.

(t represents the body of the instrument, and Z1 the handle, which is secured to the body by means of a screw-threaded portion Z for the purpose of making the handle removable from the body. A chain o is attached to the lower side of the front end of the instrument,Y

as shown at (Z'. This chain may be of any desired construction; but it is shown as being provided with projections c' for the purpose of securing it in the desired position with respectto the main body of the instrument.

(Z is an element secured to the body (Z in any desired mannerhfor example, by means of bolts ((2. It is provided with projections (Z near the center of the body of the instrument and with a cross-piece (Z 2, which extends from one side of the body (Z to the other and arrests motion of the element (Z toward the body (Z. On the rear side of the projections (Z is a slot (Z3 for the reception of the projections c' above mentioned. For convenience both of these projections (Z have a slot (Z3, the chain also being provided with projections c on both sides thereof. The chain may be passed around a pipe X, as shown in Fig. l, and extended rearwardly, so that the pair of projections c engage in a pair of slots (Z3, and the pipe will be contained within the chain and will come into contact with the front end (i3 of the body of the instrument. In order to provide for securely holding the pipe in position, projections extending from the body of the instrument are provided. These projections are shown as taking the form of integral extensions (ZJt upon the element (Z, which are shown as being curved from the side of the instrument to which the chain is attached at c. These projections are also provided with teeth or serrations (Z for the purpose of more securely holding the pipe or other article upon which the wrench is designed to be used.

It will be obvious that this wrench can be adjusted to any position by removing the projections c from the slots (Z3 and putting other projections upon the chain in that position. It will also be obvious that a secure grip is furnished and that in the use of the device it will not slip upon the pipe.

Thile a particular' form of my invention has been illustrated and described, it will be obvious that it may take other forms and that it is not strictly limited to the embodiment represented in the drawings and described in this specification.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- A l. A pipe-wrench comprising a body having a fiat front end, a chain havingI an end secured to the body at one side thereof and provided with projecting studs, a curved bar extending' from said body at the other side thereof, the front end of the body constituting' means for engaging with a pipe when placed in the wrench, and a projection upon said bar at the opposite side from that at which the chain is attached to the body, said projection having depressions for the reception of said studs.

IOO

2. A wrench comprising a body, a chain having an end secured to the body at one side thereof and provided with studs, a pair of arcshaped bars projecting from two sides of said body and curving` away from the side at which the chain is attached and provided with teeth or serrations upon their front convex surfaces, said bars being provided with a pair of projections, each of said projections extending away from the body and having a depression in its rear edge for the reception of the studs on said chain, and a cross-bar connecting said bars and resting on the upper surface of said body to hold the bars against upward motion at their outer ends.

3. A pipe-wrench, comprising a body having a Hat front end, a chain having` an end Se cured to the body at a point below and at the rear of said end, said chain being provided with studs projecting from it upon opposite sides, a pair of arc-shaped bars projecting from two sides of said body at the upper portion thereof and curving upwardly upon the arc oi' a circle, said bars having teeth upon their convex surfaces, the space between said bars and the bottom of said body which contains the said front end of the body constitut ingI means for engaging with a pipe when placed in the wrench, said bars each being.' provided with a projection extending away from the body and having a depression in its rear edge for the reception of the studs on said chain, and a cross-bar connecting said bars and resting on the upper surface of said body to hold the bars against upward motion at their outer ends, said bars being secured to the body at a point near the front end thereof.

In testimony whereofl I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK WILLIAM MCNABB. Witnesses:

M. A. MCGEE, J. E. HAIGHT. 

